16640128320 has 224 divisors, whose sum is σ = 55345047552. Its totient is φ = 4227852288.

The previous prime is 16640128273. The next prime is 16640128339. The reversal of 16640128320 is 2382104661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6247309 + ... + 6249971.

Almost surely, 2^16640128320 is an apocalyptic number.

16640128320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16640128320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27672523776).

16640128320 is an abundant number, since it is smaller than the sum of its proper divisors (38704919232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16640128320 is a wasteful number, since it uses less digits than its factorization.

16640128320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2989 (or 2979 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The spelling of 16640128320 in words is "sixteen billion, six hundred forty million, one hundred twenty-eight thousand, three hundred twenty".